The ESP-WROOM-32 from Espressif Systems is a powerful, generic Wi-Fi / Bluetooth / BLE microcontroller module that targets a wide variety of applications ranging from low-power sensor networks to the most demanding tasks such as voice encoding, music streaming and MP3 decoding.
At the heart of this module is the ESP32 chip, which is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled or powered, and the clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power off the CPU and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of thresholds. The ESP32 integrates a rich set of peripherals, including capacitive touch sensors, Hall sensors, low noise sense amplifiers, SD card interface, Ethernet, high speed SDIO/SPI, UART, I²S and I²C.
The integration of Bluetooth, Bluetooth Low Energy and Wi-Fi ensures that a wide range of applications can be targeted. The sleep current of the ESP32 chip is less than 5 μA, making it suitable for battery powered and wearable electronics. The ESP WROOM-32 module supports data rates up to 150 Mbps, and 22 dBm output power at the PA to ensure extended physical range.
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